text: // String to Object options format cache
  var optionsCache = {};
  
  // Convert String-formatted options into Object-formatted ones and store in cache
  function createOptions( options ) {
  	var object = optionsCache[ options ] = {};
  	jQuery.each( options.match( core_rnotwhite ) || [], function( _, flag ) {
  		object[ flag ] = true;
  	});
  	return object;
  }
  
  /*
   * Create a callback list using the following parameters:
   *
   *	options: an optional list of space-separated options that will change how
   *			the callback list behaves or a more traditional option object
   *
   * By default a callback list will act like an event callback list and can be
   * "fired" multiple times.
   *
   * Possible options:
   *
   *	once:			will ensure the callback list can only be fired once (like a Deferred)
   *
   *	memory:			will keep track of previous values and will call any callback added
   *					after the list has been fired right away with the latest "memorized"
   *					values (like a Deferred)
   *
   *	unique:			will ensure a callback can only be added once (no duplicate in the list)
   *
   *	stopOnFalse:	interrupt callings when a callback returns false
   *
   */
  jQuery.Callbacks = function( options ) {
  
  	// Convert options from String-formatted to Object-formatted if needed
  	// (we check in cache first)
  	options = typeof options === "string" ?
  		( optionsCache[ options ] || createOptions( options ) ) :
  		jQuery.extend( {}, options );
  
  	var // Flag to know if list is currently firing
  		firing,
  		// Last fire value (for non-forgettable lists)
  		memory,
  		// Flag to know if list was already fired
  		fired,
  		// End of the loop when firing
  		firingLength,
  		// Index of currently firing callback (modified by remove if needed)
  		firingIndex,
  		// First callback to fire (used internally by add and fireWith)
  		firingStart,
  		// Actual callback list
  		list = [],
  		// Stack of fire calls for repeatable lists
  		stack = !options.once && [],
  		// Fire callbacks
  		fire = function( data ) {
  			memory = options.memory && data;
  			fired = true;
  			firingIndex = firingStart || 0;
  			firingStart = 0;
  			firingLength = list.length;
  			firing = true;
  			for ( ; list && firingIndex < firingLength; firingIndex++ ) {
  				if ( list[ firingIndex ].apply( data[ 0 ], data[ 1 ] ) === false && options.stopOnFalse ) {
  					memory = false; // To prevent further calls using add
  					break;
  				}
  			}
  			firing = false;
  			if ( list ) {
  				if ( stack ) {
  					if ( stack.length ) {
  						fire( stack.shift() );
  					}
  				} else if ( memory ) {
  					list = [];
  				} else {
  					self.disable();
  				}
  			}
  		},
  		// Actual Callbacks object
  		self = {
  			// Add a callback or a collection of callbacks to the list
  			add: function() {
  				if ( list ) {
  					// First, we save the current length
  					var start = list.length;
  					(function add( args ) {
  						jQuery.each( args, function( _, arg ) {
  							var type = jQuery.type( arg );
  							if ( type === "function" ) {
  								if ( !options.unique || !self.has( arg ) ) {
  									list.push( arg );
  								}
  							} else if ( arg && arg.length && type !== "string" ) {
  								// Inspect recursively
  								add( arg );
  							}
  						});
  					})( arguments );
  					// Do we need to add the callbacks to the
  					// current firing batch?
  					if ( firing ) {
  						firingLength = list.length;
  					// With memory, if we're not firing then
  					// we should call right away
  					} else if ( memory ) {
  						firingStart = start;
  						fire( memory );
  					}
  				}
  				return this;
  			},
  			// Remove a callback from the list
  			remove: function() {
  				if ( list ) {
  					jQuery.each( arguments, function( _, arg ) {
  						var index;
  						while( ( index = jQuery.inArray( arg, list, index ) ) > -1 ) {
  							list.splice( index, 1 );
  							// Handle firing indexes
  							if ( firing ) {
  								if ( index <= firingLength ) {
  									firingLength--;
  								}
  								if ( index <= firingIndex ) {
  									firingIndex--;
  								}
  							}
  						}
  					});
  				}
  				return this;
  			},
  			// Check if a given callback is in the list.
  			// If no argument is given, return whether or not list has callbacks attached.
  			has: function( fn ) {
  				return fn ? jQuery.inArray( fn, list ) > -1 : !!( list && list.length );
  			},
  			// Remove all callbacks from the list
  			empty: function() {
  				list = [];
  				firingLength = 0;
  				return this;
  			},
  			// Have the list do nothing anymore
  			disable: function() {
  				list = stack = memory = undefined;
  				return this;
  			},
  			// Is it disabled?
  			disabled: function() {
  				return !list;
  			},
  			// Lock the list in its current state
  			lock: function() {
  				stack = undefined;
  				if ( !memory ) {
  					self.disable();
  				}
  				return this;
  			},
  			// Is it locked?
  			locked: function() {
  				return !stack;
  			},
  			// Call all callbacks with the given context and arguments
  			fireWith: function( context, args ) {
  				args = args || [];
  				args = [ context, args.slice ? args.slice() : args ];
  				if ( list && ( !fired || stack ) ) {
  					if ( firing ) {
  						stack.push( args );
  					} else {
  						fire( args );
  					}
  				}
  				return this;
  			},
  			// Call all the callbacks with the given arguments
  			fire: function() {
  				self.fireWith( this, arguments );
  				return this;
  			},
  			// To know if the callbacks have already been called at least once
  			fired: function() {
  				return !!fired;
  			}
  		};
  
  	return self;
  };
  